Improved steering-screw



UNITED STATES PATENT OFFICE.

IMPROVED STEERING-SCREW.

Specification forming part of Letters Patent No. 53,840, dated April 10,1866.

To all 'whom it may concern:

Be it known that I, FRANK LIBURN, of the city and State of New York,have invented certain new and useful Improvements in Steel'- ingPropellers; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

In the annexed drawings, making this specification, A represents theshaft in the vessel, which conveys power from the engines to thepropeller, said shaft lying in a horizontal position, as shown.

B represents the propeller, which is secured loosely upon the shaft A.

m and a are two sleeves, which fit over the shaft A, and which areconnected by bars hinged together so as to form a togglejoint.

I represents a collar, which lits over the bars, forming thetoggle-joint for the purpose of operating it.

K and H represent two bars, which are connected together, and one ofwhich, K, connects with the collar I, for the purpose of moving saidcollar to operate upon the toggle-joint. 'Ihe bar H stands in a verticalposition and extends up to the deck, at the rear of the vessel, and isthere operated by means of a crank-handle, having a female screw upon itwhich fits overa male screw upon the said bar H. The objectof thistoggle-joint is to press the collar m against the propeller B, and thusmake it fast upon the shaft A, or to remove the pressure and allow thepropeller to work loosely upon said shaft.

C represents a small propeller-wheel, which is used for steering thevessel. This wheel is secured fast upon a shaft, D. This shaft D liesina horizontal position and passes through a vertical beam, E.

The beam E is provided with an opening in it at right angles to theshaft D, and in the part of opening and upon the shaft is a pulley, d. Acord passes around this pulley and also around one which has itsbearings in a frame secured to the under part of the vessel, and throughwhich the shaft A passes, said pulley being secured fast to the shaft A,so that when the shaft A turns the small propeller Vwill also turn,being` revolved by means of the cord e and shaft D.

Gr represents a shaft, which stands vertically and passes up to the deckof the vessel. To the lower end of this shaft is a small gearwheel,which works into a gearwheel, F, which is made fast to the beam E.

By turning' the shaft G the wheel F is turned and also the beam E, thusturning or throwing the small steering-propeller to one side or theother of the vessel.

When the shaft of the steering-propeller is in line with the main shaftAthe said propeller can be used for giving power for propelling` thevessel, and when it is moved to the right or left of said shaft itanswers as a rudder to give direction to the vessel.

It will be seen that by unshipping the main propeller B thesteering-propeller C can be used either for propelling or for givingdirection to the vessel.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. The arrangement ofthe shaft D, the beam E, cord c, gear-wheel F, andshaft G, oonstructed and used as and for thepurpose herein specified.

2. Arrangement of the bars H and K, with the toggle-joint and propellerB, as and for purpose herein specified.

3. The combination of the propeller B with the steering-propeller C,when the two are connected and arranged to operate by the meanssubstantially as herein specified.

In witness that l claim the foregoing I have hereunto set 1n y hand inpresence of witnesse FRANK LIBURN.

Witnesses Nus. MADsoN, J. M. MASON.

